Almost everyone has experienced anxiety at some time in their lives£¬and to do so is not only probably quite sensible£¬too.In some sense£¬the feeling of anxiety is like a signal to us that we need to take action.If we are walking alone down a dark street and start to feel anxious£¬we might think£¬“This is getting frightening.I think I’ll nip into the pub and call a cab.” so we will do something to get ourselves somewhere safe.If we have an exam coming up£¬we are likely to start feeling anxious.We might think£¬“I can’t pretend it’s not happening.I’ve got to revise or I’ll totally mess up.” Once again£¬anxiety can guide us to behave in a way that is in our best interests.